What should I know about my menstrual cycle and ovulation?

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When do I ovulate?
Can I track my menstrual cycle to calculate my fertile days?
Can I get pregnant if the egg is not fertilised?

Some people think that pregnancy starts when an egg is fertilised by the sperm. Actually pregnancy is defined as beginning at implantation: the moment a fertilised egg attaches itself to the wall of the uterus. So pregnancy can actually begin days after having unprotected sex.

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